Automatic stop for phonographs



G. W. EICHELBERGER. JR

AUTOMATIC STOP FOR PHONOGRAPHS Filed Oct. 13, 1921 F X I. 7

ran-lea a is, was,

cares e fl 46 M GEORGE W, EIGHELBERGER, JR, 038 GOQSE CREEK, TEXAS.

AUI'QEIAE'I STOP FOR. PEONOGBAPHS.

Application filed Qetober 13, 1921.

To all whom it may concern:

Be it known that I, GEORGE W. EICHEL- nnnoun, Jr., citizen of the United States, residing at Goose Creek, in the county of Harris and State of Texas, have invented certain new and useful Improvements in Automatic Stops for Phonog-raphs, of which the following, is a specification.

This invention relates to automatic stops for talking machines and the primaryobject of the invention is the construction of a novel and improved'braking mechanismior automatically stopping the movement of the turn-table when the sound reproducing dcvice has reached the end of a record.

()ne of the objects of the invention is the construction of an automatic stop or brake: mechanism attachable to the tone arm of a phonograph so that as the sound reproduc- 29 ing device moves from the outer periphery of the turntable toward the center thereof, the brake will be moved in timed relation to engage the outer periphery of the turntable when-the end ofa record has been reached, thus preventing the scratching or possibletracture of a record.

Another and very important object of the invention is to produce an adjustable automatic stop or brake mechanism attachable to various types of phonographs without modifying or changing any of its standard parts and one in which the structure is extremely simple, easily assembled, rigid and durable, highly efficient in operation, prac tical and capable of being manufactured at a very low cost, whereby its commercial possibilities are greatly enhanced.

The invention will be best understood from a consideration of the following detailed description taken in connection with the accompanying drawing forming a part of this specification, with the understanding however. that the invention is not confined to any strict conformity with the showing in the drawing, but may be changed and modified so long as such changes and modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

I attain these objects and others in the accompanying drawings, wherein:

Figure 1 is a plan view showing the invention as applied to a conventional type of phonograph.

Figure 2 is an enlarged detailview show- Serial No. 507,480.

' ing the attachment when connected to the tone arm.

Figure 3 is a view taken on the line 33 of Figure 2.

Figure 4 is a sectional view taken on the line 41-4 of Figure 1; and

Figure 5 is a further section taken on the line 5-5 of Figure 4.

Referring now to the drawings wherein like reference characters designate corresponding parts throughout the several views, 5 designates a portion of the motor casing; and 6 the turntable which receives the usual recorder disk 7, said motor casing having the usual'tone arm base 8 and tone arm 9 with the reproducing device 10 thereon, all of which are ofthe common construction to various types of phonographs.

Secured to the tone arm 9 I have provideda split ring or clamp 10, the ends 11 of which are suitably secured by a thumb nut 12, to

a vertically adjustable slotted arm 13, as clearly shown by Figure 2 of the drawing, The said arm 13 is provided with a laterally extending portion 14, to which a lever arm 15 is pivotally secured, as at 16, and extends outwardly therefrom and. at right angles to the tone arm 9. A bent spring, 17, passing through suitable eyes 18, on the lever arm and member 13 respectively, is provided for resiliently engaging the end or pin 20 of a push rod 21, which rod is slidablyheld in a cylindrical extension 22 formed .on the T-shaped follower 23, which as clearly shown by Figure 1 is adapted to slide in a grooved guide 24: and adjustably held-therein by a set screw 25. The end portion 26 of the push rod 21 engages a brake arm 27, pivotally connected as at 28 to the end of the grooved guide 24 and is provided with a roller or friction engaging member 29 which is adapted to bear against the outer periphcry of the turntable and prevent the rotation thereof.

it will thus be seen that since the lever arm 1.5 attached to the tone arm moves in the arc of a circle as the reproducing device 10 or disk that the push rod 21 will be engaged and bear against-the brake arm 27 and by reason of the resilient connection a gradual braking of the rotatable disk will be afiected at the time when the reproducing device has reached the end of a record. Normally when the reproducing device is set for playing or.

advances toward the center of the turntable messes at the beginning of a record, the lever arm will be out of engagement with the push rod and it is only as the result of the movement of the tone arm with the reproducing devicethat the said lever arm will engage the pointed end of the push rod whereby the brake arm 27 may be operated.

Since the 'l'-shaped follower 23 may he adjusted in the grooved guide 2 to-various positions, it will thus be seen'that the stop the tone arm or any of the standard parts,

renders the device highly desirable and more advantageous than many others now being used to accomplish the same purpose and since the simplicity of construction permits of its easy installation, without exceptional skill, the device is particularly adapted for installation on phonographs generally.

In the accompanying drawings, l have illustrated my invention embodied in one form by way of example, and which in practice has been found to be highly satisfactory in obtaining the desired results. It will be obvious however that other embodiments may be adopted, and thatvarious changes in the details of construction. may be resorted to by those skilled in the art Without departing from the spirit and scope of the invention. It is furthermore understood that the invention isnot necessarily limited or restricted to the precise elements shown except in so far is-such limitations are specified in the subject matter being claimed.

What I claim new and desire to secure as Letters Patent is:

1. In a talking machine brake in combination with the tone arm of a phonograph, a split clamp and a Vertically adjustable slotted arm carried thereby detachubly connected to the tone arm, a resiliently held lever arm pivotally connected to the slotted arm, a pivoted brake member adapted to frictionally en 'age the periphery of a turntable and a slidably adjustable push rod interposed between the lever arm and the brake member, whereby the braking operation is adected by the movement of the tone Erma in timed relation with a phonograph 2. In a talking machine brake in combination with the tone arm of a phonogra h, a split clamp and a vertically adjusts 1e slotted arm carried thereby det-achably connected to the tone arm, a resiliently retained lever arm pivotally connected to the lower end of said slotted arm, a. rooved guide and a pivoted brake mem er connected thereto disposed between the tone arm and. a turntable and an adjustable push rod movable within said grooved guide and operable by the movement of the lever arm to afi'ect the braking operation in timed relation with a phonograph disk.

3. In a talking machine in combination with the tone of a phonograph, a split clamp and a verticall adjustable slotted arm carried thereby, etachably connected to the tone arm, a resiliently held lever arm pivotally connected to the lower end of we slotted arm at right an les to the tone arm, a grooved guide and a brake member pivot ally mounted for swinging movement at the outer end oi the grooved guide, a T-shaped follower and a push rod carried thereby adjustable in the grooved guide, said push rod having one end engageable with the brake member and its opposite end disposed for engagement with the resilient lever arm as the same is moved with the tone arm to affect the braking operation in timed relation with a phonograph disk.

In testimony whereof I affix my signature in presence of two witnesses.

ononon W. EICHELBERGER, JR;

Witnesses:

\V. C. SIMMONS, Tm) C. CARTER. 

